diff --git a/pkgs/development/libraries/imath/default.nix b/pkgs/development/libraries/imath/default.nix
index 7950667c190c..f3678064f3c5 100644
--- a/pkgs/development/libraries/imath/default.nix
+++ b/pkgs/development/libraries/imath/default.nix
@@ -6,13 +6,13 @@
 
 stdenv.mkDerivation rec {
   pname = "imath";
-  version = "3.0.5";
+  version = "3.1.2";
 
   src = fetchFromGitHub {
     owner = "AcademySoftwareFoundation";
     repo = "imath";
     rev = "v${version}";
-    sha256 = "0nwf8622j01p699nkkbal6xxs1snzzhz4cn6d76yppgvdhgyahsc";
+    sha256 = "sha256-X+LY1xtMeYMO6Ri6fmBF2JEDuY6MF7j5XO5YhWMuffM=";
   };
 
   nativeBuildInputs = [ cmake ];